Add github action

Author: raymondjacobson

.github/workflows/docker-build.yml

@@ -0,0 +1,32 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches: [ rj-docker-build ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: audius/api:latest
+          cache-from: type=registry,ref=audius/api:buildcache
+          cache-to: type=registry,ref=audius/api:buildcache,mode=max 

Dockerfile

@@ -0,0 +1,21 @@
+FROM golang:1.22-alpine AS builder
+
+WORKDIR /app
+
+COPY go.mod go.sum ./
+
+RUN go mod download
+
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o bridge-amd64 main.go
+
+FROM alpine:latest
+
+WORKDIR /app
+
+COPY --from=builder /app/bridge-amd64 /bin/bridge
+
+EXPOSE 1323
+
+CMD ["bridge"]